Big Oil Left Behind in American Shale Boom

Judging by second quarter earnings, the energy resurgence sweeping the world's largest economy seems to be benefiting just about everyone except the three largest U.S. oil and gas producers.

Crude prices remain comfortably perched above $100, and the U.S. produces record amounts of oil from its booming shale development. Still, with the exception of ConocoPhillips, it's clear that the Big Three oil are struggling to see any advantages.